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<div id="overview"><a href="../../../../../apidocs/org/sindice/rdfcommons/query/TripleSetQueryExecutor.html">View Javadoc</a></div><pre>

<a name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright 2008-2010 Digital Enterprise Research Institute (DERI)</em>
<a name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a name="4" href="#4">4</a>   <em class="jxr_comment"> * Licensed under the Apache License, Version 2.0 (the "License");</em>
<a name="5" href="#5">5</a>   <em class="jxr_comment"> * you may not use this file except in compliance with the License.</em>
<a name="6" href="#6">6</a>   <em class="jxr_comment"> * You may obtain a copy of the License at</em>
<a name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a name="8" href="#8">8</a>   <em class="jxr_comment"> *     <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a name="10" href="#10">10</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a name="11" href="#11">11</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em>
<a name="12" href="#12">12</a>  <em class="jxr_comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em>
<a name="13" href="#13">13</a>  <em class="jxr_comment"> * See the License for the specific language governing permissions and</em>
<a name="14" href="#14">14</a>  <em class="jxr_comment"> * limitations under the License.</em>
<a name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a name="16" href="#16">16</a>  
<a name="17" href="#17">17</a>  <strong class="jxr_keyword">package</strong> org.sindice.rdfcommons.query;
<a name="18" href="#18">18</a>  
<a name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> org.sindice.rdfcommons.storage.InMemoryResultSet;
<a name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> org.sindice.rdfcommons.storage.ResultSet;
<a name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> org.sindice.rdfcommons.model.Triple;
<a name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> org.sindice.rdfcommons.model.TripleBuffer;
<a name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> org.sindice.rdfcommons.model.TripleFilter;
<a name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> org.sindice.rdfcommons.model.TripleSet;
<a name="25" href="#25">25</a>  
<a name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> java.util.ArrayList;
<a name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> java.util.HashSet;
<a name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> java.util.List;
<a name="29" href="#29">29</a>  <strong class="jxr_keyword">import</strong> java.util.Set;
<a name="30" href="#30">30</a>  <strong class="jxr_keyword">import</strong> java.util.Stack;
<a name="31" href="#31">31</a>  
<a name="32" href="#32">32</a>  
<a name="33" href="#33">33</a>  <em class="jxr_javadoccomment">/**</em>
<a name="34" href="#34">34</a>  <em class="jxr_javadoccomment"> * Executes a {@link Query}.</em>
<a name="35" href="#35">35</a>  <em class="jxr_javadoccomment"> *</em>
<a name="36" href="#36">36</a>  <em class="jxr_javadoccomment"> * @author Michele Mostarda ( mostarda@fbk.eu )</em>
<a name="37" href="#37">37</a>  <em class="jxr_javadoccomment"> * @version $Id: TripleSetQueryExecutor.java 24 2010-12-01 23:47:33Z michele.mostarda $</em>
<a name="38" href="#38">38</a>  <em class="jxr_javadoccomment"> */</em>
<a name="39" href="#39">39</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/sindice/rdfcommons/query/TripleSetQueryExecutor.html">TripleSetQueryExecutor</a> {
<a name="40" href="#40">40</a>  
<a name="41" href="#41">41</a>      <em class="jxr_javadoccomment">/**</em>
<a name="42" href="#42">42</a>  <em class="jxr_javadoccomment">     * Creates a match between a triple, the previous match and the current one.</em>
<a name="43" href="#43">43</a>  <em class="jxr_javadoccomment">     * </em>
<a name="44" href="#44">44</a>  <em class="jxr_javadoccomment">     * @param t triple pattern.</em>
<a name="45" href="#45">45</a>  <em class="jxr_javadoccomment">     * @param previous previous match</em>
<a name="46" href="#46">46</a>  <em class="jxr_javadoccomment">     * @param current current match.</em>
<a name="47" href="#47">47</a>  <em class="jxr_javadoccomment">     * @return new {@link org.sindice.rdfcommons.query.Match} instance.</em>
<a name="48" href="#48">48</a>  <em class="jxr_javadoccomment">     */</em>
<a name="49" href="#49">49</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../org/sindice/rdfcommons/query/Match.html">Match</a> createMatch(<a href="../../../../org/sindice/rdfcommons/model/Triple.html">Triple</a> t, <a href="../../../../org/sindice/rdfcommons/query/Match.html">Match</a> previous, <a href="../../../../org/sindice/rdfcommons/query/Match.html">Match</a> current) {
<a name="50" href="#50">50</a>          <strong class="jxr_keyword">if</strong>(previous == <strong class="jxr_keyword">null</strong>) {
<a name="51" href="#51">51</a>              <strong class="jxr_keyword">return</strong> current;
<a name="52" href="#52">52</a>          }
<a name="53" href="#53">53</a>          String[] currVars = current.getVars();
<a name="54" href="#54">54</a>          String value  = <strong class="jxr_keyword">null</strong>;
<a name="55" href="#55">55</a>          String sub = <strong class="jxr_keyword">null</strong>;
<a name="56" href="#56">56</a>          String pred = <strong class="jxr_keyword">null</strong>;
<a name="57" href="#57">57</a>          String obj = <strong class="jxr_keyword">null</strong>;
<a name="58" href="#58">58</a>          <strong class="jxr_keyword">for</strong>(String currVar : currVars) {
<a name="59" href="#59">59</a>              <strong class="jxr_keyword">int</strong> prevVarIndex = previous.getVarIndex(currVar);
<a name="60" href="#60">60</a>              <strong class="jxr_keyword">int</strong> currVarIndex = current.getVarIndex(currVar);
<a name="61" href="#61">61</a>              <strong class="jxr_keyword">switch</strong> (prevVarIndex) {
<a name="62" href="#62">62</a>                  <strong class="jxr_keyword">case</strong> -1:
<a name="63" href="#63">63</a>                      value = currVar;
<a name="64" href="#64">64</a>                      <strong class="jxr_keyword">break</strong>;
<a name="65" href="#65">65</a>                  <strong class="jxr_keyword">case</strong> 0:
<a name="66" href="#66">66</a>                      value = t.getSubject();
<a name="67" href="#67">67</a>                      <strong class="jxr_keyword">break</strong>;
<a name="68" href="#68">68</a>                  <strong class="jxr_keyword">case</strong> 1:
<a name="69" href="#69">69</a>                      value = t.getPredicate();
<a name="70" href="#70">70</a>                      <strong class="jxr_keyword">break</strong>;
<a name="71" href="#71">71</a>                  <strong class="jxr_keyword">case</strong> 2:
<a name="72" href="#72">72</a>                      value = t.getObjectAsString();
<a name="73" href="#73">73</a>                      <strong class="jxr_keyword">break</strong>;
<a name="74" href="#74">74</a>              }
<a name="75" href="#75">75</a>              <strong class="jxr_keyword">switch</strong> (currVarIndex) {
<a name="76" href="#76">76</a>                  <strong class="jxr_keyword">case</strong> 0:
<a name="77" href="#77">77</a>                      sub = value;
<a name="78" href="#78">78</a>                      <strong class="jxr_keyword">break</strong>;
<a name="79" href="#79">79</a>                  <strong class="jxr_keyword">case</strong> 1:
<a name="80" href="#80">80</a>                      pred = value;
<a name="81" href="#81">81</a>                      <strong class="jxr_keyword">break</strong>;
<a name="82" href="#82">82</a>                  <strong class="jxr_keyword">case</strong> 2:
<a name="83" href="#83">83</a>                      obj = value;
<a name="84" href="#84">84</a>                      <strong class="jxr_keyword">break</strong>;
<a name="85" href="#85">85</a>              }
<a name="86" href="#86">86</a>          }
<a name="87" href="#87">87</a>          <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../org/sindice/rdfcommons/query/Match.html">Match</a>(current.getQueryContext(), sub, pred, obj);
<a name="88" href="#88">88</a>      }
<a name="89" href="#89">89</a>  
<a name="90" href="#90">90</a>      <em class="jxr_javadoccomment">/**</em>
<a name="91" href="#91">91</a>  <em class="jxr_javadoccomment">     * Progresses an index array starting from the &lt;i&gt;begin&lt;/i&gt; pointer, returning &lt;code&gt;-1&lt;/code&gt;</em>
<a name="92" href="#92">92</a>  <em class="jxr_javadoccomment">     * whether the progress sequence has been ended.</em>
<a name="93" href="#93">93</a>  <em class="jxr_javadoccomment">     *</em>
<a name="94" href="#94">94</a>  <em class="jxr_javadoccomment">     * @param begin pointer with the next index to be increased.</em>
<a name="95" href="#95">95</a>  <em class="jxr_javadoccomment">     * @param indexes list of indexes.</em>
<a name="96" href="#96">96</a>  <em class="jxr_javadoccomment">     * @param sets list of sets providing the upper bounds of every index.</em>
<a name="97" href="#97">97</a>  <em class="jxr_javadoccomment">     * @return the next index to be updated.</em>
<a name="98" href="#98">98</a>  <em class="jxr_javadoccomment">     */</em>
<a name="99" href="#99">99</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> progressIndex(<strong class="jxr_keyword">int</strong> begin, <strong class="jxr_keyword">int</strong>[] indexes, <a href="../../../../org/sindice/rdfcommons/model/TripleSet.html">TripleSet</a>[] sets) {
<a name="100" href="#100">100</a>         <strong class="jxr_keyword">int</strong> i;
<a name="101" href="#101">101</a>         <strong class="jxr_keyword">for</strong>(i = begin; i &lt; indexes.length; i++) {
<a name="102" href="#102">102</a>             <strong class="jxr_keyword">if</strong>(indexes[i] &lt; sets[i].getSize() - 1) {
<a name="103" href="#103">103</a>                 indexes[i]++;
<a name="104" href="#104">104</a>                 <strong class="jxr_keyword">return</strong> begin;
<a name="105" href="#105">105</a>             } <strong class="jxr_keyword">else</strong> {
<a name="106" href="#106">106</a>                 indexes[i] = 0;
<a name="107" href="#107">107</a>             }
<a name="108" href="#108">108</a>         }
<a name="109" href="#109">109</a>         <strong class="jxr_keyword">return</strong> i == indexes.length ? -1 : i;
<a name="110" href="#110">110</a>     }
<a name="111" href="#111">111</a> 
<a name="112" href="#112">112</a> 
<a name="113" href="#113">113</a>     <em class="jxr_javadoccomment">/**</em>
<a name="114" href="#114">114</a> <em class="jxr_javadoccomment">     * Multiplies a list of sets generated by a list of matches and return the result inside the given result set.</em>
<a name="115" href="#115">115</a> <em class="jxr_javadoccomment">     *</em>
<a name="116" href="#116">116</a> <em class="jxr_javadoccomment">     * @param matches</em>
<a name="117" href="#117">117</a> <em class="jxr_javadoccomment">     * @param sets</em>
<a name="118" href="#118">118</a> <em class="jxr_javadoccomment">     * @param rs</em>
<a name="119" href="#119">119</a> <em class="jxr_javadoccomment">     */</em>
<a name="120" href="#120">120</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> multiply(<a href="../../../../org/sindice/rdfcommons/query/Match.html">Match</a>[] matches, <a href="../../../../org/sindice/rdfcommons/model/TripleSet.html">TripleSet</a>[] sets, <a href="../../../../org/sindice/rdfcommons/storage/InMemoryResultSet.html">InMemoryResultSet</a> rs) {
<a name="121" href="#121">121</a>         <strong class="jxr_keyword">if</strong>(matches.length != sets.length) {
<a name="122" href="#122">122</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException();
<a name="123" href="#123">123</a>         }
<a name="124" href="#124">124</a> 
<a name="125" href="#125">125</a>         <strong class="jxr_keyword">int</strong>[] indexes = <strong class="jxr_keyword">new</strong> <strong class="jxr_keyword">int</strong>[sets.length];
<a name="126" href="#126">126</a>         <strong class="jxr_keyword">int</strong> cursor = 0;
<a name="127" href="#127">127</a>         <a href="../../../../org/sindice/rdfcommons/query/Match.html">Match</a> match;
<a name="128" href="#128">128</a>         List&lt;InMemoryResultSet.VarEntry&gt; entries = <strong class="jxr_keyword">new</strong> ArrayList&lt;InMemoryResultSet.VarEntry&gt;();
<a name="129" href="#129">129</a>         <strong class="jxr_keyword">while</strong>(cursor &gt;= 0) {
<a name="130" href="#130">130</a> 
<a name="131" href="#131">131</a>             entries.clear();
<a name="132" href="#132">132</a>             Set&lt;String&gt; processedVars = <strong class="jxr_keyword">new</strong> HashSet&lt;String&gt;();
<a name="133" href="#133">133</a>             <strong class="jxr_keyword">for</strong>(<strong class="jxr_keyword">int</strong> i = 0; i &lt; matches.length; i++) {
<a name="134" href="#134">134</a>                 match = matches[i];
<a name="135" href="#135">135</a>                 List&lt;Triple&gt; triples = sets[i].getTriples();  <em class="jxr_comment">// TODO: this MUST be optimized.</em>
<a name="136" href="#136">136</a>                 <a href="../../../../org/sindice/rdfcommons/model/Triple.html">Triple</a> triple = triples.get(indexes[i]);
<a name="137" href="#137">137</a> 
<a name="138" href="#138">138</a>                 <strong class="jxr_keyword">if</strong>(match.isSubVar()) {
<a name="139" href="#139">139</a>                     <strong class="jxr_keyword">if</strong>( ! processedVars.contains(match.getSub()) ) {
<a name="140" href="#140">140</a>                         entries.add( <strong class="jxr_keyword">new</strong> InMemoryResultSet.VarEntry(triple.getSubject()) );
<a name="141" href="#141">141</a>                         processedVars.add(match.getSub());
<a name="142" href="#142">142</a>                     }
<a name="143" href="#143">143</a>                 }
<a name="144" href="#144">144</a>                 <strong class="jxr_keyword">if</strong>(match.isPredVar()) {
<a name="145" href="#145">145</a>                     <strong class="jxr_keyword">if</strong>( ! processedVars.contains(match.getPred()) ) {
<a name="146" href="#146">146</a>                         entries.add( <strong class="jxr_keyword">new</strong> InMemoryResultSet.VarEntry(triple.getPredicate()));
<a name="147" href="#147">147</a>                         processedVars.add(match.getPred());
<a name="148" href="#148">148</a>                     }
<a name="149" href="#149">149</a>                 }
<a name="150" href="#150">150</a>                 <strong class="jxr_keyword">if</strong>(match.isObjVar()) {
<a name="151" href="#151">151</a>                     <strong class="jxr_keyword">if</strong>( ! processedVars.contains(match.getObj()) ) {
<a name="152" href="#152">152</a>                         <strong class="jxr_keyword">if</strong>(triple.isObjLiteral()) {
<a name="153" href="#153">153</a>                             entries.add(
<a name="154" href="#154">154</a>                                     <strong class="jxr_keyword">new</strong> InMemoryResultSet.VarEntry(
<a name="155" href="#155">155</a>                                         triple.getObject(),
<a name="156" href="#156">156</a>                                         ResultSet.VariableType.LITERAL
<a name="157" href="#157">157</a>                                     )
<a name="158" href="#158">158</a>                             );
<a name="159" href="#159">159</a>                         } <strong class="jxr_keyword">else</strong> {
<a name="160" href="#160">160</a>                             entries.add( <strong class="jxr_keyword">new</strong> InMemoryResultSet.VarEntry(triple.getObjectAsString()) );
<a name="161" href="#161">161</a>                         }
<a name="162" href="#162">162</a>                         processedVars.add(match.getObj());
<a name="163" href="#163">163</a>                     }
<a name="164" href="#164">164</a>                 }
<a name="165" href="#165">165</a> 
<a name="166" href="#166">166</a>             }
<a name="167" href="#167">167</a> 
<a name="168" href="#168">168</a>             rs.addResult( entries.toArray( <strong class="jxr_keyword">new</strong> InMemoryResultSet.VarEntry[entries.size()] ) );
<a name="169" href="#169">169</a> 
<a name="170" href="#170">170</a>             cursor = progressIndex(cursor, indexes, sets);
<a name="171" href="#171">171</a>         }
<a name="172" href="#172">172</a>     }
<a name="173" href="#173">173</a> 
<a name="174" href="#174">174</a>     <strong class="jxr_keyword">protected</strong> <a href="../../../../org/sindice/rdfcommons/storage/ResultSet.html">ResultSet</a> filter(<a href="../../../../org/sindice/rdfcommons/query/MatchChain.html">MatchChain</a> qry, <a href="../../../../org/sindice/rdfcommons/model/TripleSet.html">TripleSet</a> in) {
<a name="175" href="#175">175</a>         <strong class="jxr_keyword">if</strong>(qry.isEmpty()) {
<a name="176" href="#176">176</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(<span class="jxr_string">"qry cannot be empty."</span>);
<a name="177" href="#177">177</a>         }
<a name="178" href="#178">178</a> 
<a name="179" href="#179">179</a>         <a href="../../../../org/sindice/rdfcommons/storage/InMemoryResultSet.html">InMemoryResultSet</a> rs = <strong class="jxr_keyword">new</strong> <a href="../../../../org/sindice/rdfcommons/storage/InMemoryResultSet.html">InMemoryResultSet</a>( qry.getVars() );
<a name="180" href="#180">180</a> 
<a name="181" href="#181">181</a>         <strong class="jxr_keyword">if</strong>(in.getSize() == 0) {
<a name="182" href="#182">182</a>             <strong class="jxr_keyword">return</strong> rs;
<a name="183" href="#183">183</a>         }
<a name="184" href="#184">184</a> 
<a name="185" href="#185">185</a>         <em class="jxr_comment">// Creating initial results.</em>
<a name="186" href="#186">186</a>         <a href="../../../../org/sindice/rdfcommons/model/TripleSet.html">TripleSet</a> matchSet = in.getTriples( <strong class="jxr_keyword">new</strong> InternalFilter( qry.get(0) ) );
<a name="187" href="#187">187</a>         Stack&lt;TripleSet&gt; partialResults = <strong class="jxr_keyword">new</strong> Stack&lt;TripleSet&gt;();
<a name="188" href="#188">188</a>         <strong class="jxr_keyword">for</strong>(<a href="../../../../org/sindice/rdfcommons/model/Triple.html">Triple</a> triple : matchSet) {
<a name="189" href="#189">189</a>             partialResults.push( <strong class="jxr_keyword">new</strong> TripleBuffer(triple) );
<a name="190" href="#190">190</a>         }
<a name="191" href="#191">191</a> 
<a name="192" href="#192">192</a>         <a href="../../../../org/sindice/rdfcommons/query/Match.html">Match</a> previous = qry.get(0);
<a name="193" href="#193">193</a>         <a href="../../../../org/sindice/rdfcommons/query/Match.html">Match</a> currentMatch;
<a name="194" href="#194">194</a>         <a href="../../../../org/sindice/rdfcommons/model/TripleSet.html">TripleSet</a> nextPartial;
<a name="195" href="#195">195</a>         <strong class="jxr_keyword">while</strong>( ! partialResults.isEmpty() ) {
<a name="196" href="#196">196</a> 
<a name="197" href="#197">197</a>             nextPartial = partialResults.peek();
<a name="198" href="#198">198</a> 
<a name="199" href="#199">199</a>             <strong class="jxr_keyword">for</strong>(<a href="../../../../org/sindice/rdfcommons/model/Triple.html">Triple</a> triple : nextPartial) {
<a name="200" href="#200">200</a> 
<a name="201" href="#201">201</a>                 <strong class="jxr_keyword">boolean</strong> completed = <strong class="jxr_keyword">true</strong>;
<a name="202" href="#202">202</a>                 <strong class="jxr_keyword">for</strong>(<strong class="jxr_keyword">int</strong> i = 1; i &lt; qry.size(); i++) {
<a name="203" href="#203">203</a> 
<a name="204" href="#204">204</a>                     currentMatch = qry.get(i);
<a name="205" href="#205">205</a> 
<a name="206" href="#206">206</a>                     <a href="../../../../org/sindice/rdfcommons/query/Match.html">Match</a> newMatch = createMatch(triple, previous, currentMatch);
<a name="207" href="#207">207</a>                     matchSet = in.getTriples( <strong class="jxr_keyword">new</strong> InternalFilter(newMatch) );
<a name="208" href="#208">208</a> 
<a name="209" href="#209">209</a>                     <strong class="jxr_keyword">if</strong>(matchSet.getSize() == 0) {
<a name="210" href="#210">210</a>                         completed = false;
<a name="211" href="#211">211</a>                         <em class="jxr_comment">// Removing incomplete results.</em>
<a name="212" href="#212">212</a>                         <strong class="jxr_keyword">for</strong>(<strong class="jxr_keyword">int</strong> j = 1; j &lt; i; j++) {
<a name="213" href="#213">213</a>                             partialResults.pop();
<a name="214" href="#214">214</a>                         }
<a name="215" href="#215">215</a>                         <strong class="jxr_keyword">break</strong>;
<a name="216" href="#216">216</a>                     }
<a name="217" href="#217">217</a> 
<a name="218" href="#218">218</a>                     partialResults.push(matchSet);
<a name="219" href="#219">219</a> 
<a name="220" href="#220">220</a>                 }
<a name="221" href="#221">221</a> 
<a name="222" href="#222">222</a>                 <strong class="jxr_keyword">if</strong>(completed) {
<a name="223" href="#223">223</a>                     <a href="../../../../org/sindice/rdfcommons/model/TripleSet.html">TripleSet</a>[] sets = <strong class="jxr_keyword">new</strong> <a href="../../../../org/sindice/rdfcommons/model/TripleSet.html">TripleSet</a>[qry.size()];
<a name="224" href="#224">224</a>                     <strong class="jxr_keyword">for</strong>(<strong class="jxr_keyword">int</strong> i = qry.size() - 1; i &gt;= 0; i--) {
<a name="225" href="#225">225</a>                         sets[i] = partialResults.pop();
<a name="226" href="#226">226</a>                     }
<a name="227" href="#227">227</a>                     multiply(qry.getMatches(), sets, rs);
<a name="228" href="#228">228</a>                 }
<a name="229" href="#229">229</a> 
<a name="230" href="#230">230</a>             }
<a name="231" href="#231">231</a> 
<a name="232" href="#232">232</a>         }
<a name="233" href="#233">233</a> 
<a name="234" href="#234">234</a>         <strong class="jxr_keyword">return</strong> rs;
<a name="235" href="#235">235</a>     }
<a name="236" href="#236">236</a> 
<a name="237" href="#237">237</a>     <strong class="jxr_keyword">class</strong> <a href="../../../../org/sindice/rdfcommons/query/TripleSetQueryExecutor.html">InternalFilter</a> implements <a href="../../../../org/sindice/rdfcommons/model/TripleFilter.html">TripleFilter</a> {
<a name="238" href="#238">238</a> 
<a name="239" href="#239">239</a>         <strong class="jxr_keyword">private</strong> <a href="../../../../org/sindice/rdfcommons/query/Match.html">Match</a> match;
<a name="240" href="#240">240</a> 
<a name="241" href="#241">241</a>         <a href="../../../../org/sindice/rdfcommons/query/TripleSetQueryExecutor.html">InternalFilter</a>(<a href="../../../../org/sindice/rdfcommons/query/Match.html">Match</a> m) {
<a name="242" href="#242">242</a>             match = m;
<a name="243" href="#243">243</a>         }
<a name="244" href="#244">244</a> 
<a name="245" href="#245">245</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> acceptTriple(<a href="../../../../org/sindice/rdfcommons/model/Triple.html">Triple</a> triple) {
<a name="246" href="#246">246</a>             <strong class="jxr_keyword">return</strong>
<a name="247" href="#247">247</a>             ( match.isSubVar()  || triple.getSubject().equals( match.getSub())   )
<a name="248" href="#248">248</a>                     &amp;&amp;
<a name="249" href="#249">249</a>             ( match.isPredVar() || triple.getPredicate().equals(match.getPred()) )
<a name="250" href="#250">250</a>                     &amp;&amp;
<a name="251" href="#251">251</a>             ( match.isObjVar()  || triple.getObject().equals( match.getObj())    );
<a name="252" href="#252">252</a> 
<a name="253" href="#253">253</a>         }
<a name="254" href="#254">254</a>     }
<a name="255" href="#255">255</a> 
<a name="256" href="#256">256</a> 
<a name="257" href="#257">257</a> }
</pre>
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